Libvirt
CVE-2019-3886
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 5.4 (MEDIUM). Attack characteristics: adjacent network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to access resources or perform actions without proper authorization checks. No authentication is required to exploit this vulnerability. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
An incorrect permissions check was discovered in libvirt 4.8.0 and above. Rated medium severity (CVSS 5.4), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. An incorrect permissions check was discovered in libvirt 4.8.0 and above. The readonly permission was allowed to invoke APIs depending on the guest agent, which could lead to potentially disclosing unintended information or denial of service by causing libvirt to block. Affected products include: Redhat Libvirt, Opensuse Leap, Fedoraproject Fedora.
Know when Libvirt gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
An incorrect permissions check was discovered in libvirt 4.8.0 and above. The readonly permission was allowed to invoke APIs depending on the guest agent, which could lead to potentially disclosing unintended information or denial of service by causing libvirt to block.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
Double free vulnerability in the virConnectListAllInterfaces method in interface/interface_backend_netcf.c in libvirt 1.
Use-after-free vulnerability in the virNetMessageFree function in rpc/virnetserverclient.c in libvirt 1.0.x before 1.0.2
A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0, and fixed in
A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information
libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string,
Double free vulnerability in the qemuAgentGetVCPUs function in qemu/qemu_agent.c in libvirt 1.0.6 through 1.1.0 allows r
The virBitmapParse function in util/virbitmap.c in libvirt before 1.1.2 allows context-dependent attackers to cause a de
A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. Rated hi
A vulnerability was found in libvirt >= 4.1.0 in the virtlockd-admin.socket and virtlogd-admin.socket systemd units. Rat
The virConnectDomainXMLToNative API function in libvirt 1.1.0 through 1.1.3 checks for the connect:read permission inste
The qemuAgentCommand function in libvirt before 1.1.1, when a guest agent is not configured, allows remote attackers to
libvirt version 2.3.0 and later is vulnerable to a bad default configuration of "verify-peer=no" passed to QEMU by libvi
GitHub PoC
Exploit-DB